Apache Pig
Apache Pig is a high-level platform for creating MapReduce programs used with Hadoop. It provides a scripting language called Pig Latin that simplifies data processing tasks by abstracting complex Java MapReduce code into a more readable and maintainable format. It is designed for analyzing large datasets in parallel across distributed computing environments.
Developers should learn Apache Pig when working with big data on Hadoop, as it reduces the time and effort required to write and maintain MapReduce jobs for ETL (Extract, Transform, Load) processes, data analysis, and batch processing. It is particularly useful for data scientists and engineers who need to handle complex data transformations without deep Java expertise, making it ideal for ad-hoc queries and iterative data exploration in large-scale systems.